148 PROCEEDINGS OF THE NATIONAL MUSEUM vol. oo 



Transtilla a narrow, weakly sclerotized band with small hairy lateral 

 lobes. Gnathos a spined, oval knob. Socii small, hairy, fused with 

 uncus to form a narrow hood. 



Female genitalia: — Genital plate narrow, produced anteriorly, 

 strongly sclerotized ; anterior edge produced ventrally to form a small 

 shelf. Ostium small, elongate ; on each side a shallow, narrow cavity. 

 Ductus bursae membranous, slender, gradually tapering into the large 

 bursa copulatrix; ductus seminalis opening just before ostium. Sig- 

 num a small, strongly sclerotized plate with two or three strong teeth. 



Alar expanse, 19-22 mm. 



Ty^pe. — In the British Museum. 



Type locality. — Maine ( ? ) . 



Food plants. — Alniis sp. ; oak; birch. 



Distribution. — Northeastern United States and eastern Canada. 



United States records 



District of Columbia: Washington, S (May 1902, A. Busck). 



Maine: Kingsfield, $ (lO-VII-1936, no collector) ; Rangeley, 5 (12-VII-1936, 



v. H. dos Passos) ; Sebec Lake, $,299 (June and July; no collector) ; 



Wales, $ (21-VI-1907; uocoUector). 

 Maryland: Plummers Island, 3 $ $ (May and August 1903, 1919, A. Busck). 

 New Hampshire: Center Harbor, $ (July 27, 1902, H. G. Dyar) ; Dublin, 2 $ $ 



(no date; A. Busck) ; Hampton, $ (4-VII-1906, S. A. Shaw). 

 New Jersey: Essex County Park, $ (ll-VI-1899, W. D. Kearfott). 

 New York: McLean, Rhinebeck, Lond Island, etc. {teste Forbes). 

 Pennsylvania: New Brighton, 19 S $, 8 5 5 (May and June dates, 1901-1907, 



H. D. Merrick). 

 Virginia: Upton, 5 (25-IV-1913, F. Johansen [Hopkins No. 9861d]). 



Canadian records 



Nova Scotia: Petite Riviere (July 11-18, 1935, J. McDunnough) ; S. Milford 

 (June 29, 30, 1934, J. McDunnough) ; White Point Beach (July 1934 and 

 Feb. 8, 1936 [indoor record?] J. McDunnough). 



Ontario: Biseotasing (June 14-20, 1931, K. Schedl) ; Ottawa (June 3-24, 1906, 

 C. H. Young; July 19, 1926, C. H. Curran). 



Quebec: Alcove (July 8, 1936, F. A. Urquhart) ; Brome (June 4, 1936, G. S. 

 Walley) ; Gracefield (June 16, 1937, O. Peck) ; Kazubazua (June 8, 1927, F. P. 

 Ide) ; Knowlton (Feb. 13, 1930 [indoor record?], J. McDunnough) ; Meach 

 Lake (July 20, C. H. Young) ; Mount Lyall (July 15, 16, 1933, W. J. Brown). 



Reniarhs. — Forbes correctly removed allenella from Semioscopis, but 

 I do not agree with him in placing it in Agonopterix. The genus is 

 close to Agonopterix^ but the absence of the furrow or brush on the 

 labial palpus, absence of lateral lobes of the anellus, fused socii and 

 uncus in the male, and the unique signum of the female indicate that 

 this species is generically distinct. 



The genotype is the only species I have seen referable to this genus. 



